Gamma correction means and method implementing non-linear gamma characteristic curve using capacitor digital-analog converter

摘要

capacitor DAC of the present invention is used in a non-linear gamma characteristics of implementation that the gamma correction device and a gamma correction method is disclosed with respect to. Gamma correction device of the present invention includes the switching units and capacitor DAC. The switching units receive the third or fourth gamma voltage lower than the first voltage or the second one common gamma voltage and the common voltage. And switching units are at least one or more of the first and third gamma reference gamma voltage and further receiving at least one second gamma reference voltage to be set between the fourth gamma voltage to be set between the first voltage and the second gamma gamma voltage The. The capacitor DAC is equally divided by the potential difference between the first gamma reference voltage with a first gamma voltage of the first inflection point gamma reference voltage between the first and the second gamma reference and the gamma voltage, and the second gamma reference voltage in the inflection point to the third gamma voltage and the second gamma reference voltage or the second gamma reference voltage by dividing a potential difference between the fourth voltage and generates a gamma voltage transmission characteristics consisting of straight lines having different inclination. Generates a voltage transmission characteristic consisting of straight lines having different inclination. Accordingly, even with the capacitor DAC implements a non-linear gamma curve to conform well with the gamma characteristics of the LCD panel.